502541300243561 has 2 divisors, whose sum is σ = 502541300243562. Its totient is φ = 502541300243560.

The previous prime is 502541300243473. The next prime is 502541300243611. The reversal of 502541300243561 is 165342003145205.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 442971368203225 + 59569932040336 = 21046885^2 + 7718156^2 .

It is a cyclic number.

It is not a de Polignac number, because 502541300243561 - 2³⁴ = 502524120374377 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (522541300243561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 251270650121780 + 251270650121781.

It is an arithmetic number, because the mean of its divisors is an integer number (251270650121781).

Almost surely, 2^{502541300243561} is an apocalyptic number.

It is an amenable number.

502541300243561 is a deficient number, since it is larger than the sum of its proper divisors (1).

502541300243561 is an equidigital number, since it uses as much as digits as its factorization.

502541300243561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432000, while the sum is 41.

Adding to 502541300243561 its reverse (165342003145205), we get a palindrome (667883303388766).

The spelling of 502541300243561 in words is "five hundred two trillion, five hundred forty-one billion, three hundred million, two hundred forty-three thousand, five hundred sixty-one".